1. Crowd monitoring using image processing;Davies;Electron. Commun. Eng. J.,1995
2. Pfinder: real-time tracking of the human body;Wren;IEEE Trans. Pattern Anal. Mach. Intell.,1997
3. I. Haritaoglu, D. Harwood, L.S. Davis, W4: a real time system for detecting and tracking people, Proc. IEEE Conf. Comput. Vis. Pattern Recogn. 1998, 962.
4. I. Haritaoglu, D. Harwood, L. S. Davis, Hydra: multiple people detection and tracking using silhouettes, Proc. Second IEEE Workshop on Visual Surveillance, 1999.
5. Automatic estimation of crowd density using texture;Marana;J. Safety Sci.,1998